The Honor 7X is a great smartphone, and perhaps the best smartphone under $200. Although in 2018, the 32GB of storage here might be a little on the light side for many people. However, Honor did opt to keep that micro SD card slot, so that you can still add in some more storage here and double that storage, or even go as insane as adding 400GB of storage. The Honor 7X does not sport Adoptable Storage, which is unfortunate, so you cannot format the micro SD card as internal storage, but you do have the option to still use it for storing pictures, video, music and other files.
On our list below, there are plenty of great options available for the Honor 7X. Though many of the options are aimed at content creators, micro SD cards that are going to be great for recording video and storing pictures. This is because the Honor 7X has a pretty good camera here, even though it is a $200 smartphone, Honor was able to give it a dual-camera setup on the back. The SanDisk Ultra 400GB micro SD card is a great one for those that may want to start vlogging with their smartphone. As it's going to give you a ton of storage for storing videos and pictures, as well as some space for storing music offline, if you don't have an unlimited data plan with your carrier. There's also a couple of good 64GB models here, with faster read/write speeds, that are great for storing higher frame-rate video as well.
All of the options below will work great with the Honor 7X, and you really can't go wrong with any of them. Now if you have not picked up a Honor 7X just yet, you can still do that. Amazon has the Honor 7X for $199, though the red model that was released around Valentine's Day is no longer on sale, unfortunately. But it is still available in Black and Blue.